Dataset: poc_pon
Deployment: TT045

Particulate Organic Carbon and Particulate Organic Nitrogen

Principal Investigator:

Hugh W. Ducklow (Marine Biological Laboratory Ecosystems Center, MBL - Ecosystems)

BCO-DMO Data Manager:

Cynthia L. Chandler (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

U.S. JGOFS Arabian Sea (Arabian Sea)

Version:

June 3, 1997

Deployment Synonyms:

TTN045, TN045, TTN-045

Version Date:

1997-06-03

Data URL:

https://www.bco-dmo.org/dataset-deployment/450598/data

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Description

Particulate Organic Carbon and Particulate Organic Nitrogen

Methods & Sampling

Dataset acquisition description

See Platform deployments for cruise specific documentation

Deployment-specific acquisition description

   PI:                Hugh Ducklow (Virginia Institute of Marine Science)
   dataset:           Particulate Organic Carbon and Particulate Organic Nitrogen
   dates:             March 15, 1995 to April 07, 1995
   location:          N: 22.4853  S: 9.9993  W: 57.3007  E: 68.7532
   project/cruise:    Arabian Sea/TTN-045, Process cruise #2 (Spring Intermonsoon)
   ship:              R/V Thomas Thompson

Notes on the Sampling Methodology, by Hugh Ducklow

  Samples were harvested from hydrocasts into Milli-Q and sample-rinsed
  2-liter polycarbonate bottles, and concentrated over low vacuum
  filtration onto precombusted GF/F filters. Volumes collected were
  adjusted according to depth, expected carbon concentration and filter
  color (generally 1-4 liters). Filters were removed from the manifold
  before they dried and were stored folded in half in plastic envelopes
  in a dessicator. The filters were returned to the USA on dry ice, and
  finally shipped to BBSR on dry ice for analysis.

  Samples were analyzed at Bermuda Biological Station for Research
  following the BATS protocols.  NB: Filters were acidified so the
  carbon analysis is for particulate organic carbon not total particulate
  carbon.

Data Processing Description

Dataset Processing Description

More information about this dataset deployment

Funding

Award Number	Funding Source
unknown Arabian Sea NSF	National Science Foundation

Instruments

Niskin bottle

Supplied Name: Niskin Bottle

Supplied Description:

CTD/Niskin Rosette bottles.

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

Generic Description:

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
event	event number from event log		event
sta_std	Arabian Sea standard station identifier		no_bcodmo_term
sta	station number from event log		no_bcodmo_term
cast	CTD rosette cast number from event log		cast
bot	CTD rosette bottle number		no_bcodmo_term
press	sample depth reported as pressure	decibars	press
POC	particulate organic carbon	micromoles/liter	POC
PON	particulate organic nitrogen	micromoles/liter	PON
C_to_N	carbon to nitrogen molar ratio		no_bcodmo_term
flag	flags to identify suspect values: N = Particulate Organic Nitrogen; C = Particulate Organic Carbon; C_and_N = Both Carbon and Nitrogen; C/N = Carbon:Nitrogen ratio; cannot easily tell which parameter is suspect		no_bcodmo_term
depth_n	nominal sample depth	meters	no_bcodmo_term

Database

Contribute Data

Dataset: poc_pon
Deployment: TT045

Dataset acquisition description

Deployment-specific acquisition description

Notes on the Sampling Methodology, by Hugh Ducklow

Dataset Processing Description

Database

Contribute Data

Dataset: poc_ponDeployment: TT045

Dataset acquisition description

Deployment-specific acquisition description

Notes on the Sampling Methodology, by Hugh Ducklow

Dataset Processing Description

Dataset: poc_pon
Deployment: TT045